CVE-2026-8356— Stack buffer overflow in PPT presentation import
Possible ATT&CK Techniques 1AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| The Document Foundation | LibreOffice | 26.2< < 26.2.4 | affected |
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I. Basic Information for CVE-2026-8356
Vulnerability Information
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Vulnerability Title
Stack buffer overflow in PPT presentation import
Source: NVD (National Vulnerability Database)
Vulnerability Description
LibreOffice can import presentations in the legacy binary PPT format. A stack buffer overflow existed when importing a colour-replacement record. Two fixed-size colour tables were filled from the file, but the write position was not reset between the two passes over the record, so a file whose combined colour counts exceeded the table size wrote past the end of the tables on the stack. In fixed versions the unused second pass is no longer read into those tables.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存写
Source: NVD (National Vulnerability Database)
Vulnerability Title
The Document Foundation LibreOffice 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
The Document Foundation LibreOffice是The Document Foundation的办公套件。 The Document Foundation LibreOffice存在缓冲区错误漏洞，该漏洞源于导入颜色替换记录时存在栈缓冲区溢出，可能导致写入超出栈上表格末尾。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| The Document Foundation | LibreOffice | 26.2 ~ < 26.2.4 | - |
II. Public POCs for CVE-2026-8356
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-8356 (1)
Same Patch Batch · The Document Foundation · 2026-06-15 · 7 CVEs total
| CVE-2026-6040 | Heap use-after-free in ODF number-format blank-width parsing | |
| CVE-2026-6039 | Heap buffer overflow in DXF polyline import | |
| CVE-2026-6047 | Heap buffer overflow in OOXML text box element import | |
| CVE-2026-6045 | Heap buffer overflow in EMF+ gradient brush import | |
| CVE-2026-8358 | Heap buffer overflow in spreadsheet tracked-changes import | |
| CVE-2026-8357 | Heap buffer overflow in Calc formula compilation |
IV. Related Vulnerabilities
Same product: LibreOffice
- CVE-2026-8358
Heap buffer overflow in spreadsheet tracked-changes import - CVE-2026-8357
Heap buffer overflow in Calc formula compilation - CVE-2026-6047
Heap buffer overflow in OOXML text box element import - CVE-2026-6045
Heap buffer overflow in EMF+ gradient brush import - CVE-2026-6040
Heap use-after-free in ODF number-format blank-width parsing
Same vendor: The Document Foundation
- CVE-2026-8358
Heap buffer overflow in spreadsheet tracked-changes import - CVE-2026-8357
Heap buffer overflow in Calc formula compilation - CVE-2026-6047
Heap buffer overflow in OOXML text box element import - CVE-2026-6045
Heap buffer overflow in EMF+ gradient brush import - CVE-2026-6040
Heap use-after-free in ODF number-format blank-width parsing
V. Comments for CVE-2026-8356
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